search for: pgdirs

...We kill any Guest trying to touch the Switcher addresses. */ if (index >= SWITCHER_PGD_INDEX) { kill_guest(cpu, "attempt to access switcher pages"); index = 0; } +#endif /* Return a pointer index'th pgd entry for the i'th page table. */ return &cpu->lg->pgdirs[i].pgdir[index]; } +#ifdef CONFIG_X86_PAE +/* This routine then takes the PGD entry given above, which contains the + * address of the PMD page. It then returns a pointer to the PMD entry for the + * given address. */ +static pmd_t *spmd_addr(struct lg_cpu *cpu, pgd_t spgd, unsigned long vaddr)...

...We kill any Guest trying to touch the Switcher addresses. */ if (index >= SWITCHER_PGD_INDEX) { kill_guest(cpu, "attempt to access switcher pages"); index = 0; } +#endif /* Return a pointer index'th pgd entry for the i'th page table. */ return &cpu->lg->pgdirs[i].pgdir[index]; } +#ifdef CONFIG_X86_PAE +/* This routine then takes the PGD entry given above, which contains the + * address of the PMD page. It then returns a pointer to the PMD entry for the + * given address. */ +static pmd_t *spmd_addr(struct lg_cpu *cpu, pgd_t spgd, unsigned long vaddr)...

...ts re-used + * for a different process, and we think it's the same one as the one we have + * in our little pgdir cache. */ +void invalidate_pagetable(struct lg_cpu *cpu, unsigned long pgtable) +{ + unsigned int pgdir = find_pgdir(cpu->lg, pgtable); + + if (pgdir != ARRAY_SIZE(cpu->lg->pgdirs)) { + if (pgdir == cpu->cpu_pgd) + kill_guest(cpu, "Attempt to invalidate in-use pgdir"); + /* We set it to an invalid value. */ + cpu->lg->pgdirs[pgdir].gpgdir = -1UL; + } +} + /*H:470 Finally, a routine which throws away everything: all PGD entries in all * the shadow p...

...ts re-used + * for a different process, and we think it's the same one as the one we have + * in our little pgdir cache. */ +void invalidate_pagetable(struct lg_cpu *cpu, unsigned long pgtable) +{ + unsigned int pgdir = find_pgdir(cpu->lg, pgtable); + + if (pgdir != ARRAY_SIZE(cpu->lg->pgdirs)) { + if (pgdir == cpu->cpu_pgd) + kill_guest(cpu, "Attempt to invalidate in-use pgdir"); + /* We set it to an invalid value. */ + cpu->lg->pgdirs[pgdir].gpgdir = -1UL; + } +} + /*H:470 Finally, a routine which throws away everything: all PGD entries in all * the shadow p...

...We kill any Guest trying to touch the Switcher addresses. */ if (index >= SWITCHER_PGD_INDEX) { kill_guest(cpu, "attempt to access switcher pages"); index = 0; } +#endif /* Return a pointer index'th pgd entry for the i'th page table. */ return &cpu->lg->pgdirs[i].pgdir[index]; } +#ifdef CONFIG_X86_PAE +/* This routine then takes the PGD entry given above, which contains the + * address of the PMD page. It then returns a pointer to the PMD entry for the + * given address. */ +static pmd_t *spmd_addr(struct lg_cpu *cpu, pgd_t spgd, unsigned long vaddr)...

...We kill any Guest trying to touch the Switcher addresses. */ if (index >= SWITCHER_PGD_INDEX) { kill_guest(cpu, "attempt to access switcher pages"); index = 0; } +#endif /* Return a pointer index'th pgd entry for the i'th page table. */ return &cpu->lg->pgdirs[i].pgdir[index]; } +#ifdef CONFIG_X86_PAE +/* This routine then takes the PGD entry given above, which contains the + * address of the PMD page. It then returns a pointer to the PMD entry for the + * given address. */ +static pmd_t *spmd_addr(struct lg_cpu *cpu, pgd_t spgd, unsigned long vaddr)...

...++) + INIT_LIST_HEAD(&linfo->pmd_hash[i]); + + for (i=0; i < PTE_HASH_SIZE; i++) + INIT_LIST_HEAD(&linfo->pte_hash[i]); + + err = init_guest_pagetable(linfo, args[1]); + if (err) + return -ENOMEM; /* what else to return ?? */ +#if 0 + + lg->state = setup_guest_state(i, lg->pgdirs[lg->pgdidx].pgdir,args[2]); + if (!lg->state) { + err = -ENOEXEC; + goto release_pgtable; + } +#endif + err = vcpu_start(0, linfo, args[2], __va(read_cr3())); + if (err < 0) + return err; + + file->private_data = linfo->vcpu[0]; + + return sizeof(args); +} + +static ssize_t write(...

...++) + INIT_LIST_HEAD(&linfo->pmd_hash[i]); + + for (i=0; i < PTE_HASH_SIZE; i++) + INIT_LIST_HEAD(&linfo->pte_hash[i]); + + err = init_guest_pagetable(linfo, args[1]); + if (err) + return -ENOMEM; /* what else to return ?? */ +#if 0 + + lg->state = setup_guest_state(i, lg->pgdirs[lg->pgdidx].pgdir,args[2]); + if (!lg->state) { + err = -ENOEXEC; + goto release_pgtable; + } +#endif + err = vcpu_start(0, linfo, args[2], __va(read_cr3())); + if (err < 0) + return err; + + file->private_data = linfo->vcpu[0]; + + return sizeof(args); +} + +static ssize_t write(...

...lush.h> #include <asm/uaccess.h> +#include <asm/bootparam.h> #include "lg.h" /*M:008 We hold reference to pages, which prevents them from being swapped. @@ -581,15 +582,82 @@ void guest_set_pmd(struct lguest *lg, unsigned long gpgdir, u32 idx) release_pgd(lg, lg->pgdirs[pgdir].pgdir + idx); } +/* Once we know how much memory we have we can construct simple identity + * (which set virtual == physical) and linear mappings + * which will get the Guest far enough into the boot to create its own. + * + * We lay them out of the way, just below the initrd (which is wh...

...lush.h> #include <asm/uaccess.h> +#include <asm/bootparam.h> #include "lg.h" /*M:008 We hold reference to pages, which prevents them from being swapped. @@ -581,15 +582,82 @@ void guest_set_pmd(struct lguest *lg, unsigned long gpgdir, u32 idx) release_pgd(lg, lg->pgdirs[pgdir].pgdir + idx); } +/* Once we know how much memory we have we can construct simple identity + * (which set virtual == physical) and linear mappings + * which will get the Guest far enough into the boot to create its own. + * + * We lay them out of the way, just below the initrd (which is wh...

...signed int clobber; + + copy_in_guest_info(lg, pages); + + /* Put eflags on stack, lcall does rest: suitable for iret return. */ + asm volatile("pushf; lcall *lguest_entry" + : "=a"(clobber), "=b"(clobber) + : "0"(pages), "1"(__pa(lg->pgdirs[lg->pgdidx].pgdir)) + : "memory", "%edx", "%ecx", "%edi", "%esi"); +} + +int run_guest(struct lguest *lg, char *__user user) +{ + while (!lg->dead) { + unsigned int cr2 = 0; /* Damn gcc */ + + /* Hypercalls first: we might have been ou...

...signed int clobber; + + copy_in_guest_info(lg, pages); + + /* Put eflags on stack, lcall does rest: suitable for iret return. */ + asm volatile("pushf; lcall *lguest_entry" + : "=a"(clobber), "=b"(clobber) + : "0"(pages), "1"(__pa(lg->pgdirs[lg->pgdidx].pgdir)) + : "memory", "%edx", "%ecx", "%edi", "%esi"); +} + +int run_guest(struct lguest *lg, char *__user user) +{ + while (!lg->dead) { + unsigned int cr2 = 0; /* Damn gcc */ + + /* Hypercalls first: we might have been ou...

On Thu, 2007-07-19 at 23:13 +0300, S.?a?lar Onur wrote: > Hi; > > Remove -static from Documentation/lguest/Makefile, most distros only provides shared library form of zlib in their default installation. > And shared linking also provides litte tiny security for hypotetical security problems will be introduced by zlib :). Unfortunately, this introduces a security hole. See, the

On Thu, 2007-07-19 at 23:13 +0300, S.?a?lar Onur wrote: > Hi; > > Remove -static from Documentation/lguest/Makefile, most distros only provides shared library form of zlib in their default installation. > And shared linking also provides litte tiny security for hypotetical security problems will be introduced by zlib :). Unfortunately, this introduces a security hole. See, the

This patch moves lguest.c one level bellow, and enhances it with the ability to kick off 64 binaries. It would be much easier to just ifdef functions, but I have x86_64 machines loading 32-bit kernels as a longer goal, and that's why the patch features the load_elf_header() function. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> -- Glauber de Oliveira Costa Red Hat Inc.

This patch moves lguest.c one level bellow, and enhances it with the ability to kick off 64 binaries. It would be much easier to just ifdef functions, but I have x86_64 machines loading 32-bit kernels as a longer goal, and that's why the patch features the load_elf_header() function. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> -- Glauber de Oliveira Costa Red Hat Inc.

On Mon, Sep 21, 2009 at 04:52:21PM +0930, Rusty Russell wrote: > > We still assume the Guest and Host have the same PAGE_OFFSET settings, > but now we don't assume 0xC0000000. > > Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> > Cc: Matias Zabaljauregui <zabaljauregui at gmail.com> > --- > drivers/lguest/page_tables.c | 6 ++---- > 1 file

On Mon, Sep 21, 2009 at 04:52:21PM +0930, Rusty Russell wrote: > > We still assume the Guest and Host have the same PAGE_OFFSET settings, > but now we don't assume 0xC0000000. > > Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> > Cc: Matias Zabaljauregui <zabaljauregui at gmail.com> > --- > drivers/lguest/page_tables.c | 6 ++---- > 1 file

plain text document attachment (lguest64-loader.patch) I noticed that the lguest loader code for i386 was in Documentation/lguest. Well, that's fine (I guess) but it can't just be for i386. So I made a separate directory to put the loader code in. So now we have: Documentation/lguest/i386/... for the lguest i386 loader. and Documentation/lguest/x86_64/... for the lguest x86_64

plain text document attachment (lguest64-loader.patch) I noticed that the lguest loader code for i386 was in Documentation/lguest. Well, that's fine (I guess) but it can't just be for i386. So I made a separate directory to put the loader code in. So now we have: Documentation/lguest/i386/... for the lguest i386 loader. and Documentation/lguest/x86_64/... for the lguest x86_64